Electric relay.



F. TOWNSEND.

ELECTRIC RELAY.-

APPLICATION FILED LIAR. 5, 1906.

911,549,4 y atgntemem, w09.

that o.;

ETZHUGE TO'WNSEND, GF "NET tiene Wlieie a ieliiy is requirecl to 'be operated. by e. 'ut oi e. deiinite frequency.

fio. my iiiveutzou, the stationary part. of lie i'elaj! consists in an electro-magnet enel gized'by ouieut of a diinite frequency movable .member of the rela 'Weich es a eoutaot erm., Cousuts oit a een Whose Meine? when iu e ,position of equino the magnetic .tlelel betwee the stationary elecftio-magjoe euilen't is sent tliiough this movable e emetuie, of the some frequency mtl A :is tlietiiieli euergizes the field. turning DrodueeclE and. the coil will euieieot are te Close e oon.-

lie atlvan'tege us 'features ott tliis t .fi et Current muy oiv'threugli fie coil without piodueiug any ement, ou account o'tlie fact that g ui a tur: moment. The

Selective relay, poudpaitiouler fre- Ai'iuz'e l is eucl elevation the relay,

3 is a partial diagram iliuetiutiug the couiiee where eteiriatiue' current used es the powei emu-eut.

in the dirigiamo, l is the s ioumy field um uw, wound with the coil@ 93.] 2? tluougli 'y Current of deiiuite lirerom generator is made to armut e coil' 'ZQRK N. Y., ASSIGNGR NEW YORK, li?. Y.

9, 9, ae sup'ioitiiig pieces which eairy tue weight ol' the iieltl immo.

S, 1 one of the standards supporting the ll is e eouuter-weiglit holding the ermature iu the lioizoutal position when tleneigized. A i I 129 l, repesenttiie fails oelectric railway, deil itspower :from generator D," 2, or l i'g. l2 is continuous but ruil 13 is divided into sections at the Apoints le", lo, l5, are i'eactanoe bonds. lie block sections-so constituted eie each energizeo' at one euri by transformers The. relay aziiature 3y is connected iii euch bloeit across the reeetapce ooml situated el; the end of the block opposite to that Where the tronsfomer is Conf Elected.. The relay field coils 2v are euergizetl fiom the secondary of e transformer 1?; which has ite primeiy energized. from @ed connected across the terminals of aninltefrmating current ,generator A. The' peimay of the transformer 1.6 is eneigized fiomtlle Some source of alternating current and consequently the. current supplied by Such transfoi'i erg to 'the tfacii rails of zi block section, will be voi' the sume 'frequency as that of the curi-ent in the field coils 2 ot' the reny. The current derived "from the secondary of the tgfuiisformei' 16 `will maintain a dierence of potentiel lbetween the rails 123ml 13 of a block, So'tiiat the terminals` of the armature i olf the i'elaye Will`have impressed upon them alternating E. lil. F., provided the rails of the block are not sliort-circuitetl b the wheels of the car on the block. The f\-- teiiiatiug cui'leut sent through the armature 3 beiugof the seme frequency as the elteriel of the relay, will produce a deflection, moving the Contact arm 5 into contact with the eontact point S, tlius cloin local circuit energia ci by e battery 19, Wlueh operates tile Signal-2Q.

21, on anyone block, reduces the alternating di-ueience or potentiel uetween tue runs to zero, tuus .ueenerglzlng tne armature ot' tue relay willen will return to its neutral vposition, lmerruigting the current oi' tile buttery lt) und allowing rnc signal zt) to go to uun'ger.

ln tue case of en alternating current road., the Irequency ot tue relay tieni should preterubly ne different from tlmtot the power current which. operates ltne curs. in this cose, even though tue power current were to tential being constant and not alternating,

will not result in producing a deflection ot' the 'armature Q. l-ience, as already cxplnined, tile armature 3 cnn only be caused to rotate by currents ot' tlie saine frequency 'es that of the field.

wish it to be understood that time system of bloc-it signaling shown in Fig. 2 is merely illustrative of tlie application of my invention. The relay described is applicable to ell cases Where it is desired to close a local circuit by ineens of un impulse of one ticulnr frequency, received over a transmission line also carrying currents of other` frequencies.

This application is a division of my former 'apnlicatiom Serial No. 212,298, tiled June 13, i904, und l ivisli it understood that l make no claims in this no lication for the system of automatic bloc r signaling described in said former application.

l-aving thus described my invention, claim:

l. A selective relay comprising a fixed l:member having polar extensions, e movable member pivotzllly mounted between said polur extensions, and having n coil thereon whose pinne when in a position of equilibrium will be that of the magnetic tielci between the polar extensions. l.

'2. A .selective relay comprising n fixed member having field coils thereon, u movuble inernloer consisting of a coil of iviie so disposed that the plaine ol suoli coil, when in a position ot' eqnilibriin'n, will be that of the magnetic field between t-lie polar extensions of the lined member, whereby when sepurotely controlled alternating currents of the saine phase und frequency ere sent through scid coils a turning movement of the movubie member will tulce place.

.member having horizontally disposed. and .opposed polar estensionscncl an exciting coil thereon, a movable member ivotolly mounted between said polar extensions und having u coil tiiereon, whose plane when in e. position of equilibrium will be that oi` the magnetic lield between tliejpoler extensions, an arm mounted on said movable member, e. counteriveiglit mounted on said movable member, whereby when separately controlled alternating currents corresponding in phase and frequency are sent through seid lined und movable members, a turning movement movable member restored to its normal position when the c= 'rent transmitted through the movable rnc. Loer ceuses.

fl. fr selective relay comprising a stationary field. energized 'by a current of deli'- nite phase und frequency, s movable armsture coil, whose plone when in u position of equilibrium `will be that of the magnetic field, enervizecl by e separately controlled current of the saine pbase and frequency, 'ineens carried by said armature for closing e. local circuit, and means carried by said armature for restoring snicl armature to its normal oosition citer the current exciting the turning movement in said. armature has ceased.

5. A selective relay comprising e stationery lielci energized by a current of deinite phase und frequency, inoviible structure coil, whose plane when in e position-oi equilibrium will be that of the magnetic elil, traversed by s separately controlled current ot" the saune phase and frequency and by a current differing' in character from that traversing said field or armature, and ineens carried by suini aurnnture for closing o local circuit when n turning movement is imparted to seid armature under the inlinence of the alternating current traversing its coil.

'3. ln en electric relay device the combination of a stationary field energized by n current ci: e definite frequency, e. movable er` mature coil. Wliose plone when in a position of equilibrium 'will be that oi the magnetic lit-ld, traversed by currents diiiering of these currents being of tne seme frequency and pbase as that of the current in the field coils end therefore producing a turning movement in the armature coil, an auxiliary circuit controlled by the motion of the nrinuture coil, and n contact erin carried by this armature coil so es to open or close the auxiliary circuit.

- 7. ln un electric relay device tne combination ot a stationery elii energized by n' current of n definite frequency, a movable armature coil, whose plaine when in e position of equilibrium will be that of the 'magnetic of the movable member will result, and Suid .er selective relay comprising/s. lixetl from euch other in frequency und phase, one

eld, traversed by direct current and by en alternating current of the saine frequency and' phase as that of the current in the field eoile, and therefore producing a turning movement in the armature coil7 an auxiliary circuit controlled by the motion of the arnature coil, .and a Contact arin carried by thisarmature coil so as to open or close Jehe auxiliary circuit. i

8. ln. an electric relay device the combination of a station field energized by a current of ay delinite frequency, a movable armature coil traversed by currents dil'ering from each other in.1"'requency and phase, one of these-currents being' ofthe saine frequency and phase as that of the current in the ielcl coils and, therefore, producing` a turning nionient in the armature coil, an auxiliary circuit controlled. by the motion of the armature coil, and a'contact arm carried by this armature coil so esto open. or close the auxil iery circuit..

9. nan eletric relay cieviee the combination of a statienary elcl energized by cm2 rent of e. definite frequency, a mouable arma ture coi-l traifersed by direct current and by an alternating current of the Same frequency and' phase. as that of the current in the [field coils, and, therefore, producing e. turning moment. in the armature coil, an auxiliary circuit controlled by 'the motion of the armature coil, and a Contact arni carried by this armature coil so as to open or close the auxiliary circuit.

ln testimony whereof, l alix iny signature,

in the presence of two witnesaes.

' FTZHUGH TOWNSEND.

Witnesses:

FRANK CoNrion, VJ. H. PUMrBrEY. 

